Thermostatic valve.



J. W. MILLER.

THERMosATIC VALVE. f

APPLICATION FILED APR. l0. 1914.

I 4 l Syvum/Hoz wifmenoeo v JWMZ JOHN W. MILLER, 0F HARRISBURG, PENNSYLVAI'IA.

'rHERMos'rA'rIc VALVE.

To aZZ whom t may concern Be it known that I, JOHNl W. M1LLER,`a citizen of' the United States, residin Harrisburg, in thecounty of Dauphin, tate of Pennsylvania, have invented certain new and usefulv Improvements in Thermostatic Valves; and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention lrelates to valves and more particularly to the class of thermally operated valves.

The primary object of the invention is the provision of a thermostatic valve which employs an expansible and contractible core which latter is adapted whencontracted to permit the expelling of air from a radiatorprovision of a device which is automatic .in

its action. l With these and other objects in View, the inventlonlconsists in the combination and y arrangement of parts as herein set forth and Aview of a modified form of my invention.

subsequently claimed.

In the drawing: Figure 1 is a longitudinal sectional view of my device. Fig. 2

is a transverse section on the line 2-2 of Fig. 1. Fig. 3 is a transverse section on the line 3--3 of Fig. 1. Fig. 4 is a sectional Referring tothe drawing by f reference characters wherein like parts are indicated .by like characters, my device comprises a casing 1 having achamber 2 formed there- 1n. ternally threaded shank 3 having an aperture 4 extending therethrough and in communication with the chamber 2.

Extending from the casing 1 at right angles to the shank 3 is an outlet member 5 having an aperture extending longitudinally therethrough and in communication with the chamber 2.I This aperture is smaller at the point 6 where it joins thel On one endof the casing 1 is an ex.

chamber 2 than it is where it communicates with the air at 7 and has therein a Valve seat 8. This member 5 is internally threaded and screwed into engagement with these threads is a guidemember 9 having an aperture 10 extending through its upper face. yIn this guide vmember is mounted a valve 11 having a shank v12 extending through the aperture 10 zand being guided thereby. The valve 11 is arranged so that it will seat snugly in thevalve seat 8 at the proper time. ,e

' In alinement with thel shank 3 and extending from theopposite end of the casing 1 is an internally and externally threaded member 13 in which is adjustably mounted a core carryi'ig member 14 on which is mounted a core 15 adapted to be expanded or contracted by action of the steam. This member 15 may be adjusted to any desirable distance from the inner end of the hole 4 so that when it expands it will close the said hole or it may be adjusted so that it will close the said hole when it is in its contracted condition. l I 4 Mounted on the external threads on .the member 13 is a cap 16 for protecting the member 14 and making the aperture in theI said member 13 tight. j

Extending outwardly from the casing is a projection 17 having therein a longitudinal Specification of Letters Patent. Patented June 2.7, 1916, i Application filed April 10, 1914.- Serial No. 831,003.'k y i hole 18 communicating with the hole 4 in y the member 3 and communicating with the hole of the member 17 before mentioned is a radially` extending hole 19 which communicates with the atmosphere.

Mounted in the hole 18 and adapted to seat on the valve seat 20 is an adjustable valve 21, the function of which will herein- .after be described. i

When steam is let into the radiator, the

' v air therein will be expelled through the hole has been expelled'the 4steam comes in contact with the core v 15 and heating the same causes it to expand and closes the inner end of the hole 4, thus stopping the flowv of steam therefrom. As the .steam condenses in the radiator and the core 15 'assumes its con racted y condition because ofthe lack of'dsteam to f keep it expanded a vacuum 1s produced in'.v

the radiator and in the chamber 2, thus the is prevented by the valve 11 which is drawn upwardly by the suction produced by the vacuum in the chamber 2, and thus 4when steam is again admitted into the radiator it is not necessary to expel yair therefrom because ofthe fact that the valve 11 has maintained a vacuum therein. Should it be desired the valve 11 may be pushed upwardly and seated in the valve seat 8 by a e011 spring 22 encircling the shank 12 of the said valve 11, such as shown in Fig. 4 of the drawing. When this valve is opera-ted in this manner the air, on being expelled from the radiator through the aperture 6, pushes the valve 11 outwardly against the action of the spring 22. When the expulsion of air isf discontinued by reason of the fact that the hole 4 isclosed by the expansion of the core 15, the valve is aga-in seated. The action would be the same thereafter as in the other embodiment of my invention.

It is sometimes desirable to use water in vthe radiators and when this is done my device` may still be of use, for it is only necessary to screw thev core carrying member 14 inwardly until the core 15 Acloses the hole 4 when the core is in its contracted condition. When water is being let into the radiator the air therein is 'allowed to escape through the hole 18sand the hole 19 which is in communication with the irst mentioned hole. After all of the air has been'expelled and it is desiredto prevent the flow of water from the radiatorthe adjustable valve 21 is screwed inwardly until it seats in the valve seat 20, thus 'preventing the water from escaping from the radiator.

Screwed into the lower. portion of the 'member 5 is ya drip cup 23 having an upwardly extending threaded shank- 24 adapted to engage the threads on the inside of the member 5. l make this member separate from the guide member 9 so that it may be removed when found desirable and may be replaced by a different sized drip cup or even from.

, l do not wish to be limited to the specific embodiment of my invention shown, but only so far as is necessary by the claim.

What is claimed is :w-,

The combination in an automatic air valve, of a' casing having a chamber therein and ports extending from said chamber, automatic means for closing one of said ports, the other of said ports being enlarged and having screw threads therein, a tubular guide 'member having screw threads thereon engaginig the screw threads in the enlarged portion of the port, a check valve carried by the guide member, and a dri cup having a vthreaded shank extending into the enlarged portion ofthe port and having screw threads engaging lthe screw threads .in the port whereby the .guide member will be locked into position and the cup may be moved independently of the guide member.

In testimony whereof, I afx my signature, in the presence of two witnesses.

JOHN W. MILLER.

. Witnesses:

CHAS. J. BSH, LEWIS H. BOLTON. 

